Stealth.Pilot;
No, there should not be any issue. 1) By activating your FA, you are not altering your VO 2) Dinan is not an OEM option, so there is no Option Code for any Dinan after market upgrade in the VO if your were to alter it. I would just avoid the DME if I had a Dinan tune. Other than that, I wouldn't worry about coding any other modules.